Information system project management (IT-project) is a complex iterative process. An important role for the development of complex IT projects plays records of the development lifecycle (LC). The article presents an analysis of the effectiveness of the work on the creation of IT-projects based on two modified models of the life cycle: cascade and spiral. Analysis of the effectiveness of the management of the IT project was implemented on the basis of simulation. The modeling was carried out on the basis of Any Ljgic tools on the example of development of geoinformation system (GIS). It is shown that it is advisable to design GIS on the basis of a modified spiral LC with splitting of the flow of requirements at the input. The peculiarity of the proposed study is to take into account the requirements in the form of communicative interactions of different types. Under the communicative interactions are understood all the interactions between the subjects of the process of creating an IT-project: verbal and non-verbal, carried out on the basis of CASE-means.